CN107247219A - A kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity - Google Patents
A kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity Download PDFInfo
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- CN107247219A CN107247219A CN201710625938.6A CN201710625938A CN107247219A CN 107247219 A CN107247219 A CN 107247219A CN 201710625938 A CN201710625938 A CN 201710625938A CN 107247219 A CN107247219 A CN 107247219A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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Abstract
A kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity, belongs to technical field of electric power automation.It is characterized in that：Comprise the following steps：Step 1001, failure initial waveform is obtained；Step 1002, multiple reflections waveform is obtained；Step 1003, trouble point is obtained（2）Opposite end transmission waveform；Step 1004, multiple trouble points are obtained（2）With local terminal measurement point（1）The distance between value；Step 1005, invalid value is rejected；Step 1006, fault distance is obtained；Step 1007, validation fault distance.In this ultra-high-tension power transmission line abort situation decision method based on waveform similarity, the similitude of waveform is transmitted using failure initial waveform and reflection configuration and opposite end, the distance between trouble point and local terminal measurement point are carried out repeatedly to calculate and verify, the reliability for calculating obtained fault distance is substantially increased.
Description
Technical field
A kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity, belongs to power automation technology neck
Domain.
Background technology
In transmission line travelling wave ranging technology, due to reasons such as communication condition, compass of competency division and plant failures, make
Into in line fault, only one-end fault traveling wave data, it is impossible to realize automatic range function.
There is technical staff to research and develop the intelligent automatic range technology based on single-ended traveling wave principle at present, also there is partial software input
Onsite application, but due to the complexity of earth fault, existing single-ended automatic range engineering reliability is poor, and range error is big, no
It disclosure satisfy that circuit operation maintenance requirement.Therefore for single end distance measurement, also it is to rely at present artificial auxiliary using computer software
Judgement is helped, accuracy meets field requirement, but reliability relative mistake.
Raising with Operation of Electric Systems managerial skills and to power supply reliability requirement, the artificial of single end distance measurement technology is sentenced
It is disconnected not to be well positioned to meet the fast intelligent ranging requirement after transmission line malfunction, it is therefore desirable to by computer is Lai automatic real
Now based on single-ended circuit intelligent trouble ranging.
The content of the invention
The technical problem to be solved in the present invention is：The deficiencies in the prior art are overcome to utilize failure initial waveform there is provided one kind
The similitude of waveform is transmitted with reflection configuration and opposite end, the distance between trouble point and local terminal measurement point are repeatedly calculated
And checking, substantially increase the ultra-high-tension power transmission line failure based on waveform similarity for the reliability for calculating obtained fault distance
Position decision method.
The technical solution adopted for the present invention to solve the technical problems is：The ultra-high-tension power transmission line based on waveform similarity
Abort situation decision method, including local terminal measurement point and opposite end measurement point, are connected between local terminal measurement point and opposite end measurement point
There is transmission line of electricity, break down to form trouble point in transmission line of electricity, it is characterised in that：Comprise the following steps：
Step 1001, local terminal measurement point obtains the failure initial waveform of trouble point according to energy jump；
Step 1002, using fault waveform judgment basis local terminal measurement point obtain the failure primary event waveform of trouble point with
And the failure multiple reflections waveform after failure primary event waveform；
Step 1003, using failure opposite end transmit waveform judgment basis local terminal measurement point obtain opposite end measurement point be propagated through come
Opposite end transmission waveform；
Step 1004, the failure multiple reflections waveform obtained according to step 1002, correspondence obtains multiple trouble points and measured with local terminal
The distance between point value；
Step 1005, the invalid value in the multiple distance values obtained in step 1004 is rejected, and by being effectively worth to
The distance between trouble point and local terminal measurement point value；
Step 1006, the distance between trouble point and opposite end measurement point value is obtained；
Step 1007, it will obtain in the distance value and step 1006 of the trouble point obtained in step 1005 and local terminal measurement point
The distance between trouble point and opposite end measurement point value be added then between known local terminal measurement point and opposite end measurement point away from
From being subtracted each other, if the absolute value of difference is less than 5% of distance between local terminal measurement point and opposite end measurement point, according to step
The distance value of the trouble point obtained in 1005 and local terminal measurement point carries out the processing of failure.
It is preferred that, the fault waveform judgment basis described in step 1002 is：Failure initial waveform and failure one afterwards
The reflex amplitude of failure twice and width of secondary reflection waveform and afterwards arbitrary neighborhood successively decrease successively and the time difference is identical.
It is preferred that, the failure opposite end transmission waveform judgment basis described in step 1003 is：Failure initial waveform and failure
The waveform shape of opposite end transmission waveform is identical and opposite polarity of waveform.
It is preferred that, distance value between the trouble point and local terminal measurement point described in step 1004X L Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TAt the time of representing the fault waveform that local terminal measurement point is obtained,nMore than or equal to 1.
It is preferred that, distance value between the trouble point and opposite end measurement point described in step 1006X S Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TtRepresent the failure opposite end transmitted wave that local terminal measurement point is obtained
At the time of shape.
It is preferred that, in step 1005, it is to the method that described invalid value is rejected：By what is obtained in step 1004
Multiple distance values are subtracted each other two-by-two, if the difference of some distance value and other distance values is more than or equal to presetting threshold
Value, then it represents that the distance value is invalid value, and the invalid value is rejected.
It is preferred that, the span of described threshold value is 1 ~ 4, and threshold unit is km.
It is preferred that, it is described by being effectively worth to individual distance between trouble point and local terminal measurement point in step 1005
The method of value is：By the virtual value averaged of distance value.
Compared with prior art, the present invention is had an advantageous effect in that：
In this ultra-high-tension power transmission line abort situation decision method based on waveform similarity, failure initial waveform and reflection are utilized
Waveform and opposite end transmit the similitude of waveform, respectively obtain failure initial waveform and multiple failure reflection configuration, and obtain respectively
To between the arrival of each waveform, so as to try to achieve the distance value of multiple trouble points, it is possible to which invalid value therein is carried out
Reject, substantially increase the reliability of calculating.Simultaneously by calculating the distance of opposite end measurement point and trouble point, obtained with reference to calculating
Local terminal measurement point and trouble point the distance between distance and known local terminal measurement point and peer failure point to trouble point
Calculated value verified, further increase the reliability of calculating.
Brief description of the drawings
Fig. 1 is the ultra-high-tension power transmission line abort situation decision method schematic diagram based on waveform similarity.
Fig. 2 is the ultra-high-tension power transmission line abort situation decision method flow chart based on waveform similarity.
Fig. 3 is the ultra-high-tension power transmission line abort situation decision method fault waveform figure based on waveform similarity.
Wherein：1st, local terminal measurement point 2, trouble point 3, opposite end measurement point.
Embodiment
Fig. 1 ~ 3 are highly preferred embodiment of the present invention, and 1 ~ 3 the present invention will be further described below in conjunction with the accompanying drawings.
As shown in figure 1, being respectively arranged with two measurement points at transmission line of electricity two ends：Local terminal measurement point 1 and opposite end measurement point
3, after being broken down in transmission line of electricity, fault waveform can be along transmission line of electricity from trouble point 2 respectively to local terminal measurement point 1 and right
End measurement point 3 is propagated, and forms respective initial waveform in local terminal measurement point 1 and opposite end measurement point 3 respectively, then fault waveform meeting
Back and forth propagated between local terminal measurement point 1 and opposite end measurement point 3 along transmission line of electricity.
As shown in Fig. 2 a kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity, including following step
Suddenly：
Step 1001, failure initial waveform is collected；
By taking local terminal measurement point 1 as an example, after being broken down in transmission line of electricity, fault waveform is surveyed to local terminal respectively from trouble point 2
Amount point 1 and opposite end measurement point 3 are propagated, and are obtained at local terminal measurement point 1 using the mutation of transient state energy at the T1 moment in local terminal survey
Failure initial waveform at amount point 1.Its waveform is assumed to be the waveform shown in the T1 moment in Fig. 3.
After transmission line of electricity breaks down, the measurement point at transmission line of electricity two ends can monitor many fault waveforms,
Including primary fault waveform, trouble point once and multiple reflections waveform, opposite end transmission waveform etc..Primary fault waveform is by fault
Matter, the influence of ultra-high-tension power transmission line parameter, can be confirmed according to energy jump.
Step 1002, trouble point once and repeatedly failure reflection configuration is obtained；
The failure primary event waveform and failure of trouble point 2 are obtained at local terminal measurement point 1 using fault waveform judgment basis
Multiple reflections waveform.There is phase between failure initial waveform and failure primary event waveform afterwards, failure multiple reflections waveform
Primary event traveling wave, failure multiple reflections traveling wave like property and periodic characteristics, i.e. failure are compared in ripple with primary fault traveling wave
There is high similarity in shape rising edge and trailing edge characteristic, waveform widths, simply amplitude is reduced successively, while adjacent two secondary reflection
The time difference is identical between waveform.Failure primary event waveform, secondary reflection waveform and the triple reflection waveform difference of fault waveform
Waveform as shown in T2 moment, T3 moment and T4 moment in Fig. 3.
Step 1003, the opposite end transmission waveform of trouble point 2 is obtained；
Local terminal measurement point 1 transmits opposite polarity between waveform according to the failure initial waveform of local terminal and opposite end, the rising edge of waveform,
Trailing edge characteristic and waveform widths height identical characteristic, opposite end measurement point 3 is obtained at local terminal measurement point 1 and is propagated through what is come
Opposite end transmits waveform, the waveform as shown in the Tt moment in Fig. 3.
Step 1004, the distance value of multiple trouble points 2 and local terminal measurement point 1 is obtained according to failure point failure reflection configuration.
The failure multiple reflections waveform obtained according to step 1002, correspondence obtain multiple trouble points 2 and local terminal measurement point 1 it
Between distance value.
From the foregoing, the collection moment of primary fault waveform（The T1 moment）With the collection moment of failure primary event waveform
（The T2 moment）Between time difference and wave velocity product 1/2nd be local terminal measurement point 1 arrive trouble point 2 distance value；
Meanwhile, adjacent reflection configuration twice gathers the time difference at moment（Such as the collection moment of secondary reflection waveform（The T3 moment）And therefore
Hinder the collection moment of primary event waveform（The T2 moment）, failure triple reflection waveform the collection moment（The T4 moment）It is secondary with failure
The collection moment of reflection configuration（The T3 moment））Local terminal measurement point 1 is similarly to trouble point 2 with 1/2nd of the product of wave velocity
Distance.
Therefore local terminal measurement point 1 is obtained to the distance of trouble point 2X L Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TRepresent the fault waveform that local terminal measurement point 1 is obtained when
Carve,nMore than or equal to 1.
Step 1005, trouble point 2 and invalid value of the local terminal measurement point 1 in are rejected.
The multiple distance values obtained in step 1004 are subtracted each other two-by-two, if some distance value and other distance values
Difference be more than or equal to 3, then it represents that the distance value is invalid value, and the invalid value is rejected, and remaining all distance values are asked for
Local terminal measurement point 1 is averagely worth to the distance of trouble point 2.In actual operation, trouble point 2 and the distance of local terminal measurement point 1
Unit is km.
Step 1006, the distance between trouble point 2 and opposite end measurement point 3 are obtained.
From the foregoing, the collection moment of primary fault waveform（The T1 moment）The collection moment of waveform is transmitted with opposite end（Tt
Moment）Between time difference and wave velocity product 1/2nd be opposite end measurement point 3 arrive trouble point 2 distance, therefore
Opposite end measurement point 3 is obtained to the distance of trouble point 2X S Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TtRepresent the failure opposite end transmission that local terminal measurement point 1 is obtained
At the time of waveform.
Step 1007, validation fault point 2 and the distance of local terminal measurement point 1.
By the distance value and trouble point 2 of the obtained trouble point 2 in step 1005 and step 1006 and local terminal measurement point 1
It is added, is then entered with the distance between known local terminal measurement point 1 and opposite end measurement point 3 with the distance of opposite end measurement point 3
Row subtracts each other, if the absolute value of difference is less than 5% of distance between local terminal measurement point 1 and opposite end measurement point 3, then it represents that step
The distance of the trouble point 2 tried to achieve in 1005 and local terminal measurement point 1 is reliable value, and according to the processing of distance progress trouble point 2.
Specific work process and operation principle are as follows：
After being broken down in transmission line of electricity, obtained at local terminal measurement point 1 using the mutation of transient state energy at the T1 moment
Failure initial waveform at local terminal measurement point 1.Utilize the primary event traveling wave, failure multiple reflections traveling wave and primary fault of failure
Compared to there is high similarity in traveling wave, simply amplitude is reduced successively, simultaneously in waveform rising edge and trailing edge characteristic, waveform widths
The characteristics of time difference is identical between adjacent reflection configuration twice, obtains the failure primary event of trouble point 2 at local terminal measurement point 1
Waveform, failure multiple reflections waveform.Using failure initial waveform and opposite end transmission waveform between opposite polarity the characteristics of in local terminal
The opposite end transmission waveform of trouble point 2 is obtained at measurement point 1.
According to obtained multiple reflection configurations, correspondence obtains multiple trouble points 2 and the distance value of local terminal measurement point 1, then
Surplus value averaged is regard as trouble point 2 and the distance value of local terminal measurement point 1 after invalid value therein is rejected.Then
The distance between to trouble point 2 and opposite end measurement point 3, and distance value according to the trouble point 2 tried to achieve and local terminal measurement point 1 and
The distance between trouble point 2 and opposite end measurement point 3 be worth between sum and known local terminal measurement point 1 and opposite end measurement point 3 away from
From as comparison, if difference is less than 5% of distance between local terminal measurement point 1 and opposite end measurement point 3, then it represents that the failure tried to achieve
The distance of point 2 and local terminal measurement point 1 is reliable value, and according to the processing of distance progress trouble point 2.
The above described is only a preferred embodiment of the present invention, being not the limitation for making other forms to the present invention, appoint
What those skilled in the art changed or be modified as possibly also with the technology contents of the disclosure above equivalent variations etc.
Imitate embodiment.But it is every without departing from technical solution of the present invention content, the technical spirit according to the present invention is to above example institute
Any simple modification, equivalent variations and the remodeling made, still fall within the protection domain of technical solution of the present invention.
Claims (8)
1. a kind of ultra-high-tension power transmission line abort situation decision method based on waveform similarity, including local terminal measurement point（1）With it is right
Hold measurement point（3）, in local terminal measurement point（1）With opposite end measurement point（3）Between be connected with transmission line of electricity, in transmission line of electricity occur
Failure formation trouble point（2）, it is characterised in that：Comprise the following steps：
Step 1001, local terminal measurement point（1）Trouble point is obtained according to energy jump（2）Failure initial waveform；
Step 1002, using fault waveform judgment basis, in local terminal measurement point（1）Place obtains trouble point（2）Failure it is once anti-
Failure multiple reflections waveform after ejected wave shape and failure primary event waveform；
Step 1003, waveform judgment basis is transmitted using failure opposite end, in local terminal measurement point（1）Place obtains opposite end measurement point（3）
It is propagated through the opposite end transmission waveform come；
Step 1004, the failure multiple reflections waveform obtained according to step 1002, correspondence obtains multiple trouble points（2）Surveyed with local terminal
Amount point（1）The distance between value；
Step 1005, the invalid value in the multiple distance values obtained in step 1004 is rejected, and by being effectively worth to
Trouble point（2）With local terminal measurement point（1）The distance between value；
Step 1006, trouble point is obtained（2）With opposite end measurement point（3）The distance between value；
Step 1007, by the trouble point obtained in step 1005（2）With local terminal measurement point（1）Distance value and step 1006 in
Obtained trouble point（2）With opposite end measurement point（3）The distance between value be added then with known local terminal measurement point（1）With opposite end
Measurement point（3）The distance between subtracted each other, if the absolute value of difference be less than local terminal measurement point（1）With opposite end measurement point（3）
Between distance 5%, then according to the trouble point obtained in step 1005（2）With local terminal measurement point（1）Distance value carry out failure
Processing.
2. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：Fault waveform judgment basis described in step 1002 is：Failure initial waveform and failure primary event waveform afterwards
And the reflex amplitude of failure twice and width of arbitrary neighborhood successively decrease successively afterwards and the time difference is identical.
3. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：Failure opposite end described in step 1003 transmits waveform judgment basis：Failure initial waveform and failure opposite end transmitted wave
The waveform shape of shape is identical and opposite polarity of waveform.
4. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：Trouble point described in step 1004（2）With local terminal measurement point（1）Between distance valueX L Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TRepresent local terminal measurement point（1）Obtained fault waveform when
Carve,nMore than or equal to 1.
5. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：Trouble point described in step 1006（2）With opposite end measurement point（3）Between distance valueX S Calculation formula：
Wherein：VSpread speed of the waveform in transmission line of electricity is represented,TtRepresent local terminal measurement point（1）Obtained failure opposite end is saturating
At the time of ejected wave shape.
6. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：In step 1005, it is to the method that described invalid value is rejected：By the multiple distance values obtained in step 1004
Subtracted each other two-by-two, if the difference of some distance value and other distance values is more than or equal to presetting threshold value, then it represents that should
Distance value is invalid value, and the invalid value is rejected.
7. the ultra-high-tension power transmission line abort situation decision method according to claim 6 based on waveform similarity, its feature
It is：The span of described threshold value is 1 ~ 4, and threshold unit is km.
8. the ultra-high-tension power transmission line abort situation decision method according to claim 1 based on waveform similarity, its feature
It is：It is described by being effectively worth to a trouble point in step 1005（2）With local terminal measurement point（1）Between distance value
Method is：By the virtual value averaged of distance value.
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